Explosion-proof thick hot water bottle $ 6.00 Material: Rubber Color: pink gray light pink blue Size: 11*18.7CM Keep warm: about 4-8 hours Tips 1. Please don't pour boiling water, boiling water is easy to pour out when pouring water, causing safety hazards. 2. The heat preservation time is related to the ambient temperature, the above heat preservation time is for reference only. 2. The amount of water injection should not exceed 2/3 of the capacity of the hot water bottle, while removing excess air.